(19)
(11) EP 1 001 292 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
05.06.2002 Bulletin 2002/23

(43) Date of publication A2:
17.05.2000 Bulletin 2000/20

(21) Application number: 99308674.3

(22) Date of filing: 02.11.1999
(51) International Patent Classification (IPC)7G02B 6/42, H04B 10/18, G02B 6/16, G02B 6/26
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 12.11.1998 US 190504

(71) Applicant: LUCENT TECHNOLOGIES INC.
Murray Hill, New Jersey 07974-0636 (US)

(72) Inventors:
  • Giaretta, Giorgio
    Westfield, New Jersey 07090 (US)
  • White, Whitney
    Chatham, New Jersey 07928 (US)

(74) Representative: Schoppe, Fritz, Dipl.-Ing. et al
Patentanwälte Schoppe, Zimmermann, Stöckeler & Zinkler, Postfach 71 08 67
81458 München
81458 München (DE)

   


(54) Polymer fiber optical transmission system


(57) We have determined that unlike the most multimode silica fiber, multimode polymer fiber often exhibits a delay characteristic that has a broad low dispersion region where propagation delay of spatially restricted optical pulses remains relatively constant. This low dispersion region is centered around the center axis of the fiber core as a function of launch position. By directing a transmitted optical pulse to this region, we have determined that optical pulse dispersion can be significantly reduced without the need for using the prior art technique of using a single mode fiber spliced in series with the multimode fiber to reduce dispersion. A polymer fiber based optical transmission system using this arrangement exhibits relaxed alignment tolerances between the optical source and polymer fiber, while reducing dispersion and increasing bandwidth-length product.







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